Sometimes called 'black gold', Iowa's deep, rich soils are a treasure that formed over thousands of years under the very best of the world's grasslands. In language that is scientifically sound but accessible to the layperson, Kathleen Woida explains how soils formed and have changed over centuries and millennia in the land between two rivers.
Prenumerera på vårt nyhetsbrev för att få fantastiska erbjudanden och inspiration för din nästa läsning.
Genom att registrera dig accepterar du vår personuppgiftspolicy.